As of today the stable firmware supports FIDO2 based on the W3C specifications. OpenPGPCard is currently available as alpha firmware for the NK3 Mini - there will be a new alpha release (hope this week), which will extend the support to the NK3A/NK3C and also provide RSA support. When this will be part of the official, stable firmware is hard to predict, at least some months - so there has been hopefully enough testing to release it as stable. OTP/PasswordSafe will also be soon available through the alpha firmware.